DNA Structure

Look at the diagram. Number 2 is a ________.

• phosphoric acid molecule

• phosphate group

• ribose sugar

• deoxyribose sugar

Tags

1a backbone

Look at the diagram. Number 3 is a ________.

• phosphoric acid molecule

• phosphate group

• ribose sugar

• deoxyribose sugar

Tags

1a backbone

Look at the diagram. Number 4 is a ________ molecule.

• cytosine

• guanine

• thymine

• adenine

Tags

1b bases and pairing

Look at the diagram. Number 5 is a ________ molecule.

• cytosine

• guanine

• thymine

• adenine

Tags

1b bases and pairing

Look at the diagram. What does number 1 represent?

• a sulfate

• a nucleic acid

• an ionic bond

• a hydrogen bond

Tags

1c hydrogen bond

Which of the following does NOT describe DNA?

• DNA is in the nucleus of every cell except red blood cells.

• DNA can be found in mitochondria and chloroplasts.

• The DNA code is exactly the same in every type of cell.

• DNA is composed of the nitogen bases adenine, cytosine, guanine and uracil.

Tags

2 DNA function

The Base-Pair Rule states that

• A only bonds to T, and C only bonds to G

• A only bonds to C, and T only bonds to G

• A only bonds to G, and C only bonds to T

• A only bonds to A, and C only bonds to C

Tags

1b bases and pairing

The bases attach to the DNA backbone at the

• phosphates

• deoxyribose sugars

• hydrogen bonds

• ribose sugars

Tags

1d base to sugar

The process of copying DNA is called

• transcription

• ligation

• replication

• translation

Tags

3 replication

The process of copying DNA is

• a conservative process because both strands are newly created.

• a semi-conservative process because one new strand is newly created while the other is an original strand.

• a synthesis process because both strands are newly created.

• a flexible process because sometimes both strands are new and other times both strands are original strands.

Tags

3 replication